package com.zhentao.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.zhentao.common.constants.ArticleConstants;
import com.zhentao.common.constants.BehaviorConstants;
import com.zhentao.common.redis.CacheService;
import com.zhentao.mapper.ApArticleConfigMapper;
import com.zhentao.mapper.ApArticleContentMapper;
import com.zhentao.mapper.ArticleMapper;
import com.zhentao.model.article.dto.ArticleDto;
import com.zhentao.model.article.dto.ArticleInfoDto;
import com.zhentao.model.article.pojo.ApArticleConfig;
import com.zhentao.model.article.pojo.ApArticleContent;
import com.zhentao.model.article.vo.HotArticleVo;
import com.zhentao.model.common.enums.AppHttpCodeEnum;
import com.zhentao.model.mess.ArticleVisitStreamMess;
import com.zhentao.model.user.projo.ApUser;
import com.zhentao.service.ArticleFreemarkerService;
import com.zhentao.service.ArticleService;
import com.zhentao.model.article.dto.ArticleHomeDto;
import com.zhentao.model.article.pojo.ApArticle;
import com.zhentao.model.common.dtos.ResponseResult;
import com.zhentao.utils.thread.AppThreadLocalUtil;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.*;
import java.util.stream.Collectors;

@Service
public class ArticleServiceImpl implements ArticleService {
    //设置常量 当页数文字个数传递的值大于50时，使用默认的
    private final static short MAX_PAGE_SIZE = 50;

    @Autowired
    private ArticleMapper articleMapper;
    @Autowired
    private ArticleService articleService;
    @Autowired
    private ApArticleContentMapper apArticleContentMapper;
    @Autowired
    private ApArticleConfigMapper apArticleConfigMapper;
    @Autowired
    private ArticleFreemarkerService articleFreemarkerService;
    @Autowired
    private CacheService cacheService;


    @Override
    public ResponseResult load(Short loadtype, ArticleHomeDto dto) {
        //1.校验参数
        Integer size = dto.getSize();
        if(size == null || size == 0){
            size = 10;
        }
        size = Math.min(size,MAX_PAGE_SIZE);
        dto.setSize(size);

        //类型参数检验
        if(!loadtype.equals(ArticleConstants.LOADTYPE_LOAD_MORE)&&!loadtype.equals(ArticleConstants.LOADTYPE_LOAD_NEW)){
            loadtype = ArticleConstants.LOADTYPE_LOAD_MORE;
        }
        //文章频道校验
        if(StringUtils.isEmpty(dto.getTag())){
            dto.setTag(ArticleConstants.DEFAULT_TAG);
        }

        //时间校验
        if(dto.getMaxBehotTime() == null) dto.setMaxBehotTime(new Date());
        if(dto.getMinBehotTime() == null) dto.setMinBehotTime(new Date());
        //2.查询数据
        List<ApArticle> apArticles = articleMapper.loadArticleList(dto,loadtype);

        //3.结果封装
        ResponseResult responseResult = ResponseResult.okResult(apArticles);
        return responseResult;
    }
    /**
     * 加载文章列表
     * @param dto
     * @param type      1 加载更多   2 加载最新
     * @param firstPage true  是首页  flase 非首页
     * @return
     */
    @Override
    public ResponseResult load2(Short type, ArticleHomeDto dto, boolean firstPage) {
        if(firstPage){
            String jsonStr = cacheService.get(ArticleConstants.HOT_ARTICLE_FIRST_PAGE + dto.getTag());
            if(org.apache.commons.lang3.StringUtils.isNotBlank(jsonStr)){
                List<HotArticleVo> hotArticleVoList = JSON.parseArray(jsonStr, HotArticleVo.class);
                ResponseResult responseResult = ResponseResult.okResult(hotArticleVoList);
                return responseResult;
            }
        }
        return load(type,dto);
    }

    @Override
    public ResponseResult saveArticle(ArticleDto dto) {
        //1.校验参数
        if(dto==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //2.判断文章id是否存在，如果不存在，进行添加操作，如果存在进行修改

        ApArticle apArticle=new ApArticle();
        BeanUtils.copyProperties(dto,apArticle);

        if(dto.getId()==null){
            //保存文章
            articleMapper.insert(apArticle);
            //保存配置
            ApArticleConfig apArticleConfig=new ApArticleConfig();
            apArticleConfig.setArticleId(apArticle.getId());

            apArticleConfig.setIsComment(true);
            apArticleConfig.setIsForward(true);
            apArticleConfig.setIsDelete(false);
            apArticleConfig.setIsDown(false);

            apArticleConfigMapper.insert(apArticleConfig);
            //保存内容
            ApArticleContent apArticleContent=new ApArticleContent();
            apArticleContent.setArticleId(apArticle.getId());
            apArticleContent.setContent(dto.getContent());
            apArticleContentMapper.insert(apArticleContent);

        }else{
            //进行修改操作
            //修改文章
            articleMapper.updateById(apArticle);
            //修改内容
            QueryWrapper<ApArticleContent> queryWrapper=new QueryWrapper<>();
            queryWrapper.lambda().eq(ApArticleContent::getArticleId,dto.getId());
            ApArticleContent apArticleContent=apArticleContentMapper.selectOne(queryWrapper);
            apArticleContent.setContent(dto.getContent());

            apArticleContentMapper.updateById(apArticleContent);
        }

        //异步调用 生成静态的html文件并上传到minIo中
        articleFreemarkerService.buildArticleToMinIO(apArticle,dto.getContent());

        //3.返回结果 修改成功应该返回文章的id
        return ResponseResult.okResult(apArticle.getId());
    }
    @Override
    public ResponseResult loadArticleBehavior(ArticleInfoDto dto) {

        //0.检查参数
        if (dto == null || dto.getArticleId() == null || dto.getAuthorId() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        //{ "isfollow": true, "islike": true,"isunlike": false,"iscollection": true }
        boolean isfollow = false, islike = false, isunlike = false, iscollection = false;

        ApUser user = AppThreadLocalUtil.getUser();
        if(user != null){
            //喜欢行为
            String likeBehaviorJson = (String) cacheService.hGet(BehaviorConstants.LIKE_BEHAVIOR + dto.getArticleId().toString(), user.getId().toString());
            if(StringUtils.isNotBlank(likeBehaviorJson)){
                islike = true;
            }
            //不喜欢的行为
            String unLikeBehaviorJson = (String) cacheService.hGet(BehaviorConstants.UN_LIKE_BEHAVIOR + dto.getArticleId().toString(), user.getId().toString());
            if(StringUtils.isNotBlank(unLikeBehaviorJson)){
                isunlike = true;
            }
            //是否收藏
            String collctionJson = (String) cacheService.hGet(BehaviorConstants.COLLECTION_BEHAVIOR+user.getId(),dto.getArticleId().toString());
            if(StringUtils.isNotBlank(collctionJson)){
                iscollection = true;
            }

            //是否关注
            Double score = cacheService.zScore(BehaviorConstants.APUSER_FOLLOW_RELATION + user.getId(), dto.getAuthorId().toString());
            System.out.println(score);
            if(score != null){
                isfollow = true;
            }

        }

        Map<String, Object> resultMap = new HashMap<>();
        resultMap.put("isfollow", isfollow);
        resultMap.put("islike", islike);
        resultMap.put("isunlike", isunlike);
        resultMap.put("iscollection", iscollection);

        return ResponseResult.okResult(resultMap);
    }
    /**
     * 更新文章的分值  同时更新缓存中的热点文章数据
     * @param mess
     */
    @Override
    public void updateScore(ArticleVisitStreamMess mess) {
        //1.更新文章的阅读、点赞、收藏、评论的数量
        ApArticle apArticle = updateArticle(mess);
        //2.计算文章的分值
        Integer score = computeScore(apArticle);
        score = score * 3;

        //3.替换当前文章对应频道的热点数据
        replaceDataToRedis(apArticle, score, ArticleConstants.HOT_ARTICLE_FIRST_PAGE + apArticle.getChannelId());

        //4.替换推荐对应的热点数据
        replaceDataToRedis(apArticle, score, ArticleConstants.HOT_ARTICLE_FIRST_PAGE + ArticleConstants.DEFAULT_TAG);

    }
    /**
     * 替换数据并且存入到redis
     * @param apArticle
     * @param score
     * @param s
     */
    private void replaceDataToRedis(ApArticle apArticle, Integer score, String s) {
        String articleListStr = cacheService.get(s);
        if (StringUtils.isNotBlank(articleListStr)) {
            List<HotArticleVo> hotArticleVoList = JSON.parseArray(articleListStr, HotArticleVo.class);

            boolean flag = true;

            //如果缓存中存在该文章，只更新分值
            for (HotArticleVo hotArticleVo : hotArticleVoList) {
                if (hotArticleVo.getId().equals(apArticle.getId())) {
                    hotArticleVo.setScore(score);
                    flag = false;
                    break;
                }
            }

            //如果缓存中不存在，查询缓存中分值最小的一条数据，进行分值的比较，如果当前文章的分值大于缓存中的数据，就替换
            if (flag) {
                if (hotArticleVoList.size() >= 30) {
                    hotArticleVoList = hotArticleVoList.stream().sorted(Comparator.comparing(HotArticleVo::getScore).reversed()).collect(Collectors.toList());
                    HotArticleVo lastHot = hotArticleVoList.get(hotArticleVoList.size() - 1);
                    if (lastHot.getScore() < score) {
                        hotArticleVoList.remove(lastHot);
                        HotArticleVo hot = new HotArticleVo();
                        BeanUtils.copyProperties(apArticle, hot);
                        hot.setScore(score);
                        hotArticleVoList.add(hot);
                    }


                } else {
                    HotArticleVo hot = new HotArticleVo();
                    BeanUtils.copyProperties(apArticle, hot);
                    hot.setScore(score);
                    hotArticleVoList.add(hot);
                }
            }
            //缓存到redis
            hotArticleVoList = hotArticleVoList.stream().sorted(Comparator.comparing(HotArticleVo::getScore).reversed()).collect(Collectors.toList());
            cacheService.set(s, JSON.toJSONString(hotArticleVoList));

        }
    }
    /**
     * 计算文章的具体分值
     * @param apArticle
     * @return
     */
    private Integer computeScore(ApArticle apArticle) {
        Integer score = 0;
        if(apArticle.getLikes() != null){
            score += apArticle.getLikes() * ArticleConstants.HOT_ARTICLE_LIKE_WEIGHT;
        }
        if(apArticle.getViews() != null){
            score += apArticle.getViews();
        }
        if(apArticle.getComment() != null){
            score += apArticle.getComment() * ArticleConstants.HOT_ARTICLE_COMMENT_WEIGHT;
        }
        if(apArticle.getCollection() != null){
            score += apArticle.getCollection() * ArticleConstants.HOT_ARTICLE_COLLECTION_WEIGHT;
        }

        return score;
    }
    /**
     * 更新文章行为数量
     * @param mess
     */
    private ApArticle updateArticle(ArticleVisitStreamMess mess) {
        ApArticle apArticle = articleMapper.selectById(mess.getArticleId());
        apArticle.setCollection(apArticle.getCollection()==null?0:apArticle.getCollection()+mess.getCollect());
        apArticle.setComment(apArticle.getComment()==null?0:apArticle.getComment()+mess.getComment());
        apArticle.setLikes(apArticle.getLikes()==null?0:apArticle.getLikes()+mess.getLike());
        apArticle.setViews(apArticle.getViews()==null?0:apArticle.getViews()+mess.getView());
        articleMapper.updateById(apArticle);
        return apArticle;

    }
}
